122 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



Stephens (Incidents of Travel in Yucatan, 1843, 2, p. 470), mentions the 

 taking of this hawk, which he calls the Laughing Falcon, at Chichen by Dr. 

 Cabot, in 1842. 



28. *Falco albigularis Dacdin. 



Falco rufigularis (Daud.). Chapman, Bull. Amer. Mus. Nat. Hist. 1896, 8, 

 p. 286. 



White-throated Falcon. 

 Maya name, ql-lls. 

 Five specimens : 



a. 9, March 1, 1904. 



b. 9, March 8, 1904. 



c. $, March 8, 1904. 



d. (alcoholic), 1904. 



e. Chichen-Itza, 189- E. H. Thompson. 



Two or three of these beautiful little hawks were commonly to be seen about 

 the Sacred Cenote or in the nearby milpas. On March 1, Mr. Thompson 

 observed a pair of them mating, but the ova of a female taken that day were 

 still small. In the fresh specimen the skin in front of the eye is orange ; the 

 cere is near to chrome yellow. 



29- *Cerchneis sparveria (Linne). 



Sparrow Hawk. 

 Maya name, l-kos. 

 Three specimens : 



a. 9 ( ? ), March 19, 1904. 



b. (alcoholic), 1904. 



c. 9 , San Ignacio, Feb. 9, 1904. 



One or more were seen or heard nearly every day. 



BUBONIDAE. 



30. Asio magellanicus mayensis (Nelson). 

 Bubo virginianus mayensis Nelson, Proc. Biol. Soc. Wash., 1901, 14, p. 170. 



Yucatan Horned Owl. 



Maya name, tun-ku-lu-tsu. 



Often, especially in the early part of the night, I heard owls hooting, which 

 I think certainly must have been the Yucatan Horned Owl. The note was a 

 loud hoo-oo-oo, hoo, hoo. I was unable to obtain any specimens. Mr. Thomp- 

 son said that he had seen the bird, and that it looked like the Great Horned 

 Owl (Bubo virginianus). This bird is known from only the type specimen 

 collected at Chichen-Itza by Nelson and Goldman in 1901. 



